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BROWN ARGUS BLUE. , 153 



that before us; and that the opinion expressed by Mr. Edward 

 Newman, in the "Entomological Magazine," volume ii. page 

 515, is correct; namel}^, that as they advance to the midland 

 counties, "an evident change has taken place, the band of rust- 

 coloured spots has become less bright; at Manchester these 

 spots have left the upper wing almost entirely; at Castle Eden 

 Dene, they are scarcely to be traced, and a black spot in the 

 centre of the upper wing becomes fringed with white; in some 

 specimens it is quite white; the butterfly then changes its name 

 to Salmacis. We proceed farther northward, and the black 

 pupil leaves the eyes on the under side, until at Edinburgh 

 it is quite gone; then it is called Artaxerxes." 

 The plate is from specimens in my own cabinet. 



